/*
 * Copyright (C) 2005-present, 58.com.  All rights reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.wuba.wpaxos.storemachine;

/**
 * 内置状态机
 */
public interface InsideSM extends StateMachine {
	
	public byte[] getCheckpointBuffer();
	
	public UpdateCpRet updateByCheckpoint(byte[] cpBuffer);
	
	static class UpdateCpRet {
		private boolean isChange = false;
		private int ret;
		
		public UpdateCpRet () {
		}
		
		public UpdateCpRet(boolean isChanged, int ret) {
			this.isChange = isChanged;
			this.ret = ret;
		}

		public boolean isChange() {
			return isChange;
		}

		public void setChange(boolean isChange) {
			this.isChange = isChange;
		}

		public int getRet() {
			return ret;
		}

		public void setRet(int ret) {
			this.ret = ret;
		}
	}
}
